Hammer for hammer mills



Feb. 3, 1931. c. E. SPITZER 1,791,007

v HAMMER FOR HAMMER MILLS I Filed Sept. 1:, 192a E. vjjoif'z er I attozvwuo Patented Feb. 3, 1931 manner I ram oFFie CHARLES E. SPITZER, F COOPERSIBURG, PENNSYLVANIA HAMMER non HAMMER MILLS Application filed September 13, 1928. Serial No. 305,756.

7 This inventionis a hammer for use in the hammer type of grinding or pulverizing m lls and is intended more particularlyior use in pulverizing grain, although it is adapted for use in reducing other material. The invention provides a hammer which may be used for a long time without being resharpened or having its working iace renewed and consists in certain novel features which will be hereinafter first fully described and then more particularly defined in the appended claim. v

In the accompanying drawing:

Figure 1 is a sectional elevation of a portion of a gang of hammer mill disks having my improved hammer applied thereto;

Fig. 2 is a front elevation of the same;

Fig. 3 is an enlarged side View of the hammer removed, and

Fig. 4c is an edge view of the hammer.

Hammer mills comprise a casing into which the material is fed and which has an outlet in its lower portion through which the pulverized material may discharge. The casing is of a general cylindrical formation and as it, in itself, constitutes no part ofmyinvention and is not necessary to an understanding of the same, it is omitted from' the accompanying drawing. Rotatablymoun-ted i the is secured a plurality of disks 2 which are held in parallel spaced relation by spacers or .washers 3 01": suitable type. Pivotaliy mounted between adj acentdisks are hammers 4, any number of which may be employed and liner is laterally enlarged to providea head 8 and the side edges of the head are formed casing is a shaft, indicated at 1, upon which which are free to ,swin 1r about their res ,ective with corrugations or notches 9 which. extend diagonally with respect to the side faces'oi the hammer,- asshown most clearly in F ig l, the corrugations upon the opposite edges extending in opposite directions so that sit ier edge may be presented forwardly to act upon the material without requiring any change in the mode of operation. The symmetrical outline of the hammers permits them to be fitted between and attached to the disks without requiring special care to be observed in selectingthe hammers and placing them.

, In operation, the disks are rotated at high speed in the usual manner as the grain or other material is fed through the top of the casing and the hammers will swing through the material. to'cut the same and quickly pulverize it to a size which will permit the particles to. pass through the screen outlet of x the casing, Any particles. which are not thoroughly pulverized and reducedwill con tinue to move around within the casingand will be respea-tedly acted upon by the ham, mers so that eventually all the material will be reduced to the desired pulverized condition. 'Whenone corrugated or working edge I of the hammer has been worn down so as to v be no longer effective, it is not necessary to at once sharpenthe edge or renew the same inasmuch as the hammer maybe simply removed and reversed and then replaced, presenting'the formerly'inactive edge to the grain'so that the use of themill'will notwbe V suspendedi Y: My improved hammer may be produced ata low'cost and may be installed in any ex'isting mill without requiring any structural changes therein.

Having thus described'the: invention, I claim; I r U 7 An elongated flat parallel sidedreversible milling hammer comprising an alining shank and head in the same plane, the edges of the r Vi I head being outwardly curved and diagonally corrugated, the corrugations of one edge extending in a reverse direc-tiontothe corrugations ofthe'oppositeedge. f I

In testimony whereo'flaihx my signature.

CHARLES E.- SPITZER. [L. s] 

